EP0011597B1 - Agent de gonflage pour la fabrication de verre-mousse à partir de poudre de verre et procédé pour sa préparation - Google Patents

Agent de gonflage pour la fabrication de verre-mousse à partir de poudre de verre et procédé pour sa préparation Download PDF

Info

Publication number
EP0011597B1
EP0011597B1 EP79810116A EP79810116A EP0011597B1 EP 0011597 B1 EP0011597 B1 EP 0011597B1 EP 79810116 A EP79810116 A EP 79810116A EP 79810116 A EP79810116 A EP 79810116A EP 0011597 B1 EP0011597 B1 EP 0011597B1
Authority
EP
European Patent Office
Prior art keywords
glass
water
blowing agent
bentonite
weight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP79810116A
Other languages
German (de)
English (en)
Other versions
EP0011597A1 (fr
Inventor
Otto Anton Vieli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Millcell AG
Original Assignee
Millcell AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Millcell AG filed Critical Millcell AG
Priority to AT79810116T priority Critical patent/ATE1641T1/de
Publication of EP0011597A1 publication Critical patent/EP0011597A1/fr
Application granted granted Critical
Publication of EP0011597B1 publication Critical patent/EP0011597B1/fr
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C11/00—Multi-cellular glass ; Porous or hollow glass or glass particles
    • C03C11/007—Foam glass, e.g. obtained by incorporating a blowing agent and heating

Definitions

  • the invention relates to a blowing agent for producing foam glass from glass powder and a method for its production.
  • a process is already known (cf. CH-A 426 601 and 473 741 and US-A 3 321 414) for converting from glass powder with the addition of a blowing agent which releases gas at higher temperatures in a flat bed or rotary tube furnace at 700 to 900 ° C to expand to foam glass granules or foam glass moldings with predominantly closed cells.
  • a blowing agent i.a. an aqueous solution of water glass and an organic substance such as glycerin.
  • This blowing agent has the disadvantage that the gas is split off at too low a temperature and too unevenly, so that the gas cavities which produce the porous structure of the foam glass occur in different sizes. Macropores are formed, in the walls of which micropores are enclosed; this results in disadvantages with regard to strength and water absorption of the foam glass obtained.
  • blowing agents i.a. Mixtures used which are either a) sodium silicate, water and glycerin; or b) contain carbon black, sodium silicate and a bentonite. Such blowing agents cannot be used for the production of glass foam since they lead to products with open cells and, in case b), also from dark gray to black color.
  • the object of the invention is now to provide a blowing agent for the use mentioned at the outset, in which the gas is only split off at the sintering temperature of the glass and then in an extremely fine distribution, in order thereby to ensure the production of a fine-pored and thus firmer foam glass.
  • the blowing agent according to the invention is characterized in that it is a durable, water-dilutable, colloidal dispersion which consists of at least water, water glass, glycerol and an alkali bentonite, preferably alkali bentonite.
  • the amount of alkali bentonite is expediently 1 to 10% by weight, based on the blowing agent.
  • the invention further relates to a process for the preparation of the blowing agent according to the invention, which is characterized in that first an alkali bentonite, in particular sodium bentonite, is mixed with water to form a slurry and then this slurry is mixed with water glass, further water and the glycerol to form a colloidal dispersion .
  • an alkali bentonite in particular sodium bentonite
  • blowing agent according to the invention has a whole series of surprising and decisive advantages over the known blowing agents mentioned at the outset.
  • the foaming of the glass foam takes place not only through the released water vapor but also through the gas components formed when the glycerin is cracked.
  • the bloating then leads to a foam glass with an extremely uniform, fine-celled pore structure, i.e. it has significantly more pores of the same size than the previously known foam glasses.
  • the foam glass produced by means of the blowing agent described with the same specific wiping and the same water resistance, has a hitherto unknown high compressive strength.
  • the existing alkali bentonite portion has a strong absorption capacity, so that it absorbs the water and water glass portion in a uniform swelling process.
  • the resulting colloidal dispersion forms a plastic mass when mixed with the glass powder, which is easy to granulate. Since it binds the glass powder without forming voids, you get a wear-resistant raw granulate.
  • the plasticizing effect of the blowing agent according to the invention even coarser glass powder can be used to produce raw granules which are resistant to abrasion.
  • the ability of the blowing agent to be mixed with the glass powder can be improved further when the blowing agent is used as a concentrate and additional water is added during the mixing with the glass powder.
  • the property of the alkali bentonite comes into play: to keep the absorbed water and water glass parts enclosed up to a relatively high temperature and to release them as gas components in extremely finely divided form when the glass meal is expanded during the blowing process.
  • the blowing agent according to the invention acts not only as a "blowing agent” in the true sense of the word but also as a flux at the same time. It also acts as a binder in the production of raw granules that are subsequently to be expanded.
  • the blowing agent thus obtained is a durable, water-soluble, flowable paste.
  • the blowing agent When used, the blowing agent is mixed with 500 parts by weight of glass powder. The mixture is dried at 150 to 250 ° C to a water content of 1 to 2% by weight and then ground.
  • the grated mixture containing blowing agent is then expanded in a known manner in a flat bed or rotary tube oven at 700 to 900 ° C. to foam glass.
  • the blowing agent thus obtained is a durable, water-dilutable, colloidal dispersion with a sodium bentonite content of 9.6% by weight.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Glass Compositions (AREA)
  • Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Detergent Compositions (AREA)

Claims (4)

1. Agent de gonflage pour la fabrication de verre-mousse à cellules en majeure partie fermées à partir de poudre de verre, caractérisé en ce qu'il représente une dispersion colloïdale, pouvant être diluée à l'eau et pouvant être conservée et qui consiste au moins en eau, verre soluble, glycérol et en bentonite alcaline.
2. Agent de gonflage selon la revendication 1, caractérisé en ce que la bentonite alcaline qu'il contient est de la bentonite sodique.
3. Agent de gonflage selon la revendication 1, caractérisé en ce qu'il contient 1 à 10 % en poids de bentonite alcaline.
4. Procédé de production d'un agent de gonflage selon la revendication 1, caractérisé en ce qu'il consiste à mélanger tout d'abord une bentonite alcaline avec de l'eau afin de former un magma, puis à mélanger ce magma avec du verre soluble, une quantité supplémentaire d'eau et le glycérol pour former une dispersion colloïdale.
EP79810116A 1978-10-06 1979-10-05 Agent de gonflage pour la fabrication de verre-mousse à partir de poudre de verre et procédé pour sa préparation Expired EP0011597B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79810116T ATE1641T1 (de) 1978-10-06 1979-10-05 Blaehmittel zur erzeugung von schaumglas aus glasmehl und verfahren zu dessen herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH10441/78 1978-10-06
CH1044178A CH637356A5 (de) 1978-10-06 1978-10-06 Blaehmittel zur erzeugung von schaumglas aus glasmehl und verfahren zu dessen herstellung.

Publications (2)

Publication Number Publication Date
EP0011597A1 EP0011597A1 (fr) 1980-05-28
EP0011597B1 true EP0011597B1 (fr) 1982-10-13

Family

ID=4363267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79810116A Expired EP0011597B1 (fr) 1978-10-06 1979-10-05 Agent de gonflage pour la fabrication de verre-mousse à partir de poudre de verre et procédé pour sa préparation

Country Status (8)

Country Link
EP (1) EP0011597B1 (fr)
JP (1) JPS55500782A (fr)
AT (1) ATE1641T1 (fr)
CA (1) CA1125000A (fr)
CH (1) CH637356A5 (fr)
DE (1) DE2963854D1 (fr)
DK (1) DK238880A (fr)
WO (1) WO1980000697A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS616142A (ja) * 1984-06-21 1986-01-11 Nippon Sheet Glass Co Ltd 中空ガラス球の製造方法
DE19536665C2 (de) * 1995-09-30 1997-11-27 Wiv Compact Engineering Ingeni Verfahren zur kontinuierlichen Schaumglasherstellung
RU2424997C2 (ru) * 2009-09-07 2011-07-27 Зао "Стиклопорас" Способ получения гранулированного пеносиликата penostek
RU2439005C2 (ru) * 2009-10-22 2012-01-10 Зао "Стиклопорас" Гранулированная шихта для изготовления пеностекла и способ ее получения
RU2540719C1 (ru) * 2013-10-07 2015-02-10 Общество С Ограниченной Ответственностью "Научно-Производственное Объединение "Диатомит" Шихта для получения пеностекла
RU2594416C1 (ru) * 2015-06-15 2016-08-20 Открытое акционерное общество "Саратовский институт стекла" Способ получения блочного пеностекла

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE637983A (fr) * 1961-05-02
SE314938B (fr) * 1961-05-18 1969-09-15 Kreidl W
AT291085B (de) * 1966-01-19 1971-06-25 Utolit A G Verfahren zur Herstellung von glasartigem, geblähtem Granulat mit Zellstruktur
CH539004A (de) * 1967-03-13 1973-08-31 Utolit Ag Verfahren zur Herstellung von geblähten Materialien und hiernach hergestelltes Blähgestein
CH502964A (de) * 1967-07-31 1971-02-15 Trasswerke Meurin Betr Sgmbh Verfahren zur Herstellung eines Silikatschaumgranulats sowie Silikatschaumgranulat und Verwendung desselben
DE2012856A1 (de) * 1969-04-01 1970-10-15 Corning Glass Works, Corning, N.Y. (V.St.A.) Schaumglas und Verfahren zu seiner Herstellung

Also Published As

Publication number Publication date
CA1125000A (fr) 1982-06-08
EP0011597A1 (fr) 1980-05-28
WO1980000697A1 (fr) 1980-04-17
DK238880A (da) 1980-06-03
DE2963854D1 (en) 1982-11-18
JPS55500782A (fr) 1980-10-16
ATE1641T1 (de) 1982-10-15
CH637356A5 (de) 1983-07-29

Similar Documents

Publication Publication Date Title
DE2631481C2 (de) Verfahren zur Herstellung von expandierbaren Perlen und deren Verwendung
EP0182793B1 (fr) Corps en ceramique a porosite elevee utilisee a des fins d'adsorption ou d'absorption, notamment pour litieres pour animaux, procede pour sa fabrication et son utilisation
DE2453882C3 (de) Verfahren zur Herstellung von Schaumglas mit hoher mechanischer Festigkeit bei einem Porendurchmesser von höchstens 1,5 mm und einer Schüttdichte von weniger als 1
DE2620865A1 (de) Mit faser verstaerktes, zementhaltiges, hydratisiertes reaktionsprodukt und verfahren zu seiner herstellung
DE2656473A1 (de) Nichtbrennbares und rauchloses baumaterial und verfahren zu seiner herstellung
DE1496553B2 (de) Verfahren zur herstellung von isoliermaterial
DE3239033A1 (de) Porosiertes, insbesonder feuerfestes keramisches erzeugnis sowie verfahren zu seiner herstellung
EP0011597B1 (fr) Agent de gonflage pour la fabrication de verre-mousse à partir de poudre de verre et procédé pour sa préparation
AT241326B (de) Verfahren zur Herstellung von porösen, glasartigen Formkörpern
DE2055283A1 (de) Verfahren zur Herstellung von Silikat schäumen aus Alkalimetallsilikaten
DE1769315A1 (de) Schaumstoffe aus Polytetrafluoraethylen
DE4023561C2 (fr)
DE865872C (de) Herstellung von kohlenstoffhaltigen Formmassen
DE1284348B (de) Verfahren zur Herstellung von Blaehton mit verbesserten Eigenschaften
DE600437C (de) Verfahren zur Herstellung eines kuenstlichen Baustoffes
DE2517380B2 (de) Verfahren zur Herstellung von keramischen Siliziumnitridschaumkörpern bzw. Siliziumkarbidschaumkörpern
AT254427B (de) Verfahren zur Herstellung von Schaumglas
DE672930C (de) Verfahren zur Herstellung poroesen Kautschuks
DE602248C (de) Verfahren zur Herstellung eines poroesen, aus Kalziumhydrosilikat bestehenden Kunststeinmaterials
DE3221207A1 (de) Verfahren zur herstellung einer waermedaemmenden beton- oder moertelmischung oder dgl., welche zuschlagstoffe mit wesentlich niedrigerem spezifischen gewicht enthaelt
DE897670C (de) Stabilisierungsmittel fuer Porenbeton
DE2156303A1 (de) Verfahren zur Herstellung von geblähten Schaumglaskörnern beliebiger Form und Korngröße
DE831188C (de) Verfahren zur Herstellung geformter Koerper aus pflanzlichem Faserstoffmaterial
DE607301C (de) Verfahren zur Herstellung von fuer die Verwendung in Atmungsapparaten geeigneten Sauerstoffpraeparaten
DE890433C (de) Herstellung von suspendierbaren Schwefel enthaltenden festen Massen, insbesondere fuer die Schaedlingsbekaempfung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

17P Request for examination filed
ITF It: translation for a ep patent filed

Owner name: SOCIETA' ITALIANA BREVETTI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

REF Corresponds to:

Ref document number: 1641

Country of ref document: AT

Date of ref document: 19821015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 2963854

Country of ref document: DE

Date of ref document: 19821118

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19830824

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19831031

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19840930

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19841002

Year of fee payment: 6

Ref country code: AT

Payment date: 19841002

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19841031

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19841129

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19841231

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19851005

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19851006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19851031

BERE Be: lapsed

Owner name: MILLCELL A.G.

Effective date: 19851031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19860501

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19860630

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881118

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19891031

EUG Se: european patent has lapsed

Ref document number: 79810116.8

Effective date: 19860730

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990707

Year of fee payment: 20

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT